Why Choose the ABB 2CDS383103R0277 S303P-K2NA Miniature Circuit Breaker?
The ABB 2CDS383103R0277, also known as the S303P-K2NA, is a premium miniature circuit breaker (MCB) engineered to provide dependable protection against overloads and short circuits in demanding industrial electrical installations. As part of the trusted ABB S300P System pro M compact range, it combines exceptional fault-clearing performance, compact dimensions and long-term reliability for industrial power distribution systems.
Featuring a 3P+N configuration, the S303P-K2NA protects all three phase conductors while incorporating a switched neutral pole. Its Type K tripping characteristic is specifically designed for circuits with high inrush currents, making it ideal for motors, transformers, contactors, solenoids and other inductive industrial loads where nuisance tripping must be minimised.
With a rated current of 2 A, a rated operating voltage of 415 V AC, a 25 kA rated short-circuit breaking capacity (Icn) and a 100 kA ultimate breaking capacity (Icu), the ABB S303P-K2NA delivers dependable protection for industrial control panels, OEM machinery, automation systems and electrical distribution boards.
Key Advantages
- Premium ABB miniature circuit breaker for industrial electrical protection.
- 2 A rated current with Type K tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- 25 kA rated short-circuit breaking capacity.
- Designed for circuits with high motor and transformer starting currents.
- Compact DIN rail mounting for industrial switchboards and control panels.
Key Features
- ABB S300P System pro M compact series.
- 2 A rated operational current.
- Type K tripping characteristic.
- Three protected poles with switched neutral.
- 25 kA rated service short-circuit breaking capacity (Icn).
- 100 kA ultimate short-circuit breaking capacity (Icu).
- Suitable for AC and DC applications.
- Top or bottom supply connection.
- Contact position indication (Red ON / Green OFF).
- DIN rail mounting.
Reliable Protection for High Inrush Industrial Loads
The ABB S303P-K2NA combines thermal overload protection with instantaneous magnetic short-circuit protection to safeguard industrial machinery, cabling and electrical distribution systems. This dual protection improves operational safety while helping minimise costly downtime and equipment damage.
Its Type K characteristic is specifically intended for applications where motors, transformers and magnetic devices produce high transient starting currents, allowing normal equipment start-up while still delivering rapid fault disconnection during genuine short-circuit conditions.
Typical Applications
- Industrial motor control circuits.
- Transformer protection.
- Automation and PLC panels.
- Machine control systems.
- OEM machinery.
- Industrial electrical distribution boards.
